kernel: Information exposure in fd_locked_ioctl function in drivers/block/floppy.c
Published Mar 8, 2018
5.9
MEDIUMCVSS 3.0
EPSS 0.68%
Description
An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.
Affected products
No data.
Configuration 1
- ≤ 4.15.7
Configuration 2
- 12.04
- 14.04
- 16.04
- 17.10
- 18.04
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-1062.el7
Fixed · RHSA-2019:2029
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-1062.rt56.1022.el7
Fixed · RHSA-2019:2043
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-alt
Fix deferred
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-1062.el7 | Fixed | RHSA-2019:2029 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-1062.rt56.1022.el7 | Fixed | RHSA-2019:2043 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
AV:L/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.68% (0.00676) | 50.45th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.70% (0.00700) | 48.13th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.00% (0.00003) | 0.13th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.07% (0.00075) | 34.24th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.07% (0.00075) | 32.28th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00075) | 30.25th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.88% (0.02880) | 63.65th | v1 |
| Jan 6, 2022 | 2.88% (0.02880) | 63.31th | v1 |
| Sep 1, 2021 | 2.88% (0.02880) | 80.71th | v1 |
| Apr 14, 2021 | 2.88% (0.02880) | 0.00th | v1 |
References (17)
- https://access.redhat.com/errata/RHSA-2019:2029 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2019:2043 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2018-7755 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1553216 Issue Tracking
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html mailing-listx_refsource_MLIST
- https://lkml.org/lkml/2018/3/7/1116 x_refsource_MISCExploitThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-7755
- https://usn.ubuntu.com/3695-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3695-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3696-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3696-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3697-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3697-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3698-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3698-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-7755
- https://www.debian.org/security/2018/dsa-4308 vendor-advisoryx_refsource_DEBIAN
Change history (0)
No recorded changes yet.